How to Get Separate Turn Signals and Brake Lights to Work on a Trailer

Question

Question:

hi i have 2004 ford 350 diesel 6.0 with a 7 pole outlet i build a trailer and i put red for stop amber for turn white for reverse wen i put turn signal red and amber turn on wen i push stop pedal also red and amber turn on and i notice that in the 7 pole wiring diagram stop and turn are the same wire what part do i need to separate the wires in the trailer

asked by: Jorge F

0

Expert Reply:

If your trailer has separate turn signals from the brake lights and you want them to remain that way, you will need to use a special converter. On the trailer side, behind the 7-Way, you will attach the Vehicle to Vehicle Taillight Converter, # 118158. On the 7-Way wiring, locate the wire for the left turn and brake and attach it to the yellow wire on the converter input side. Connect the wire from right turn and stop to the green wire input side. Ground the white wire to the trailer frame.

On the output side that will go to the trailer lights, you will have the yellow wire, which will now be left turn only, the green wire for right turn only, and a red wire for brake lights only. Note that the running light wire is not involved at all.

expert reply by: Michael H

0

John

3/18/2020

I have a seven way Hopkins blade plug that I attached to my car. everything is working properly when I do a voltage test of each individual blade to the ground blade. The vehicle has a separate turn signal indicator. It looks like the running lights and the brake lights use the same bulb. I did not connect the brake light cable. Because I couldn’t figure out which blade it would connect to on the seven way blade.

Chris R.

3/19/2020

Can you tell me what model vehicle the 7-Way is on? Most likely you're going to need to add a converter of some sort to combine those circuits, but I want to make sure I get you the right one (or that something else isn't also needed). We'll get this figured out!

Devin

7/8/2021

@ChrisR Chris, I have the same issue...The brake wire from my truck doesn't have anywhere to connect...If I link it to one of the turn signals it activates the turn signal, if I connect it to the other it activates the turn signal, but if I connect it to both at the same time it interconnects them and both turn signals blink with either right of left signal on from the truck.

Jon G.

7/8/2021

@Devin It sounds like you're needing the Hopkins Tail Light Converter # HM48847 to tie your brake light function in with your turn signals on your truck.

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How to Get Separate Turn Signals and Brake Lights to Work on a Trailer

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